[PATCH v2 4/5] PCI: dwc: Skip PCIE_MSI_INTR0* programming if MSI is disabled
From: Jisheng Zhang <hidden>
Date: 2020-09-24 11:11:12
Also in:
linux-amlogic, linux-arm-msm, linux-omap, linux-pci, linux-samsung-soc, linux-tegra, lkml
Subsystem:
pci driver for synopsys designware, pci native host bridge and endpoint drivers, pci subsystem, the rest · Maintainers:
Jingoo Han, Manivannan Sadhasivam, Lorenzo Pieralisi, Krzysztof Wilczyński, Bjorn Helgaas, Linus Torvalds
If MSI is disabled, there's no need to program PCIE_MSI_INTR0_MASK and PCIE_MSI_INTR0_ENABLE registers. Signed-off-by: Jisheng Zhang <redacted> --- drivers/pci/controller/dwc/pcie-designware-host.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/pci/controller/dwc/pcie-designware-host.c b/drivers/pci/controller/dwc/pcie-designware-host.c
index d2de8bc5db91..7a8adf597803 100644
--- a/drivers/pci/controller/dwc/pcie-designware-host.c
+++ b/drivers/pci/controller/dwc/pcie-designware-host.c@@ -641,7 +641,7 @@ void dw_pcie_setup_rc(struct pcie_port *pp) dw_pcie_setup(pci); - if (!pp->ops->msi_host_init) { + if (pci_msi_enabled() && !pp->ops->msi_host_init) { num_ctrls = pp->num_vectors / MAX_MSI_IRQS_PER_CTRL; /* Initialize IRQ Status array */
--
2.28.0
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